To automatically block.
To use the autoblock technique.
(An) automatic blocking (inhibition of a feature etc.).
A technique used in rappelling and ascending, with a friction hitch around the climbing rope.
To cancel or terminate.
To close shutters covering.
To close up (a building) for a prolonged period of inoccupancy.
The part of a camera, normally closed, that opens for a controlled period of time to let light in when taking a picture.
One who shuts or closes something.
Protective panels, usually wooden, placed over windows to block out the light.